The Hong Kong government’s decision to scrap a tax break for electric vehicles has had a dramatic effect on sales of Tesla cars in the city, according to The Wall Street Journal.

Data analysis from The Journal has shown that zero new Tesla Model S sedans and Model X SUVs were registered with the transport department in April, after the vehicle-registration tax waiver for electrics was discontinued at the start of that month.

Following that, just five privately owned electric cars were registered in May.

The Journal reported a sales surge just before the April 1 rule change, with 2,939 Tesla vehicles registered in March and nearly 3,700 entering the department’s books for the first quarter of 2017. The end of the tax break was announced in February.